Dr. Cian Gallagher Does Reverse Osmosis Water Remove Healthy Minerals? Yes. Reverse Osmosis water has lost most of its calcium and magnesium. For most people this is not a real worry. Food gives us most of our calcium and magnesium, not water. The World Health Organizati... Clean Drinking Water Essential Minerals Filtered Water Remineralizer Reverse Osmosis 11 Aug 2026 Our blog